Journal
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
Volume 430, Issue -, Pages 51-57Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.colsurfa.2013.03.069
Keywords
Photoacoustic imaging; Photoacoustic pressure pulses; Nanosecond laser pulses; Contrast agents; Metal nanoparticles; Physical modeling
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Funding
- Innovative Techno-Hub for Integrated Medical Bio-imaging of the Project for Developing Innovation Systems, from the Ministry of Education, Culture, Sports, Science and Technology (MEXT), Japan
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We present a physical model that describes the acoustic pressure pulses from diluted suspensions of metal nanospheres in a liquid medium irradiated by laser pulses. The experimental measurements of the photoacoustic signals are also reported, where the suspensions of 8-nm gold nanospheres in water at different concentrations and different temperatures were irradiated by 0.8-ns laser pulses. We mainly investigate how the nanosphere concentration and the suspension temperature influence the photoacoustic responses. The estimations from our model are found to be in good agreement with the results from the experiments. (C) 2013 Elsevier B.V. All rights reserved.
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